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A nuclear power plant auxiliary steam system and treatment method

A technology for auxiliary steam and nuclear power plants, which is applied to auxiliary equipment of nuclear power plants, nuclear power generation, and reduction of greenhouse gases. , simplify equipment configuration, and achieve the effect of inclusive design

Active Publication Date: 2018-03-09
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of complex auxiliary steam system of nuclear power plant, high cost of equipment procurement and maintenance, and low production efficiency, the invention provides an auxiliary steam system of nuclear power plant and a processing method

Method used

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  • A nuclear power plant auxiliary steam system and treatment method
  • A nuclear power plant auxiliary steam system and treatment method
  • A nuclear power plant auxiliary steam system and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] An embodiment of the present invention provides an auxiliary steam system of a nuclear power plant, see figure 1 , the system consists of:

[0062] The main steam pipeline 10 is connected to the secondary circuit of the nuclear power plant, and is used to transmit the main steam generated by the secondary circuit;

[0063] The steam conversion component 20 is connected to the main steam pipeline 10, and is used to depressurize the main steam and convert it into auxiliary steam;

[0064] At least one auxiliary steam pipeline assembly 30 is connected to the steam converting assembly 20 for transmitting the converted auxiliary steam to the unit user 40 .

[0065] Specifically, see figure 2 , the auxiliary steam pipe assembly 30 includes a first auxiliary steam pipe assembly and a second auxiliary steam pipe assembly arranged in parallel,

[0066] The first auxiliary steam pipeline assembly includes a first isolation valve 301 and a first auxiliary steam pipeline 302, t...

Embodiment 2

[0082] The present invention provides a treatment method for auxiliary steam of a nuclear power plant, which is suitable for the auxiliary steam system of a nuclear power plant shown in Embodiment 1, see image 3 , the method includes:

[0083] S1. Receive and transmit the main steam generated by the secondary circuit of the nuclear power plant;

[0084] S2, converting the main steam into auxiliary steam after decompression;

[0085] S3. Transmitting the converted auxiliary steam to the user 40 of the unit.

[0086] Specifically, see Figure 4 , step S2 includes:

[0087] S21. Determine whether the main steam isolation valve is open, and synchronously control the closing or opening of the pneumatic valve 201 according to the shut-off state;

[0088] In this embodiment, the closing time of the pneumatic valve 201 is less than 5 seconds, and by controlling the synchronization of the pneumatic valve 201 and the main steam isolation valve, the problem of using STR deaerators, ...

Embodiment 3

[0106] An embodiment of the present invention provides an auxiliary steam system of a nuclear power plant, see Figure 5 , the system includes a steam conversion assembly 20, an auxiliary steam pipeline assembly 30 and a unit user 40, wherein the auxiliary steam pipeline assembly 30 and the unit user 40 are the same as those of the first embodiment figure 2 same, the difference is that the auxiliary steam system of this embodiment also includes:

[0107] The steam turbine 70 is connected between the main steam pipeline 10 and the pneumatic valve 201, and is used to convert the main steam into wet steam through six stages of steam extraction;

[0108] The steam-water separation box 203 is connected between the pneumatic valve 201 and the pressure reducing valve 202 , and is used to dehumidify the wet steam, and transmit the dehumidified main steam to the pressure reducing valve 202 .

[0109]In this embodiment, the main steam becomes wet steam with a pressure of 2 MPa.a and a...

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Abstract

The invention provides an auxiliary steam system for a nuclear power plant and a processing method. The system comprises a main steam pipe which is used for transmitting main steam generated by two loops; a steam conversion module which is used for reducing the pressure of the main steam and converting the main steam into auxiliary steam; and an auxiliary steam pipe assembly which is used for conveying the converted auxiliary steam to a set user. The system reduces the equipment investment and subsequent maintenance and operation cost through simplifying the equipment configuration of the auxiliary steam system, effectively reduces the use frequency of an auxiliary boiler of the nuclear power plant, and improves the overall economical performances of the nuclear power plant from the angles of initial investment and operation cost. The system solves a problem of possible radioactive shielding, and achieves the inclusive design of radioactivity.

Description

technical field [0001] The invention relates to the technical field of nuclear power plants, in particular to an auxiliary steam system and a treatment method of a nuclear power plant. Background technique [0002] The role of the auxiliary steam system in nuclear power plants is mainly to meet the steam demand of users such as deaerators, steam turbine shaft seals and hot water production heaters during unit start-up and normal operation. The steam used is saturated steam of about 1.2MPa.a. [0003] At present, the nuclear power plants that have been built in China generally use steam converter systems and auxiliary boilers to realize the production of auxiliary steam, that is, the auxiliary boiler is used to provide auxiliary steam during the start-up of the first unit of the nuclear power plant, and after the first unit is in normal operation, through steam conversion The auxiliary steam generated by the boiler system is used for the start-up and operation of subsequent u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21D1/02
CPCG21D1/02Y02E30/00
Inventor 严庆云
Owner 中广核工程有限公司